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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of thermomechanical fatigue on bond strength of repaired composites

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Author(s):
da Silva, Bruno Rodrigues [1] ; Silva Sousa, Ana Beatriz [1] ; Ramos Salles de Oliveira, Dayane Carvalho [2] ; Martins Giamatei Contente, Marta Maria [1] ; Alandia-Roman, Carla Cecilia [1] ; Coelho Sinhoreti, Mario Alexandre [2] ; Panzeri Pires-de-Souza, Fernanda de Carvalho [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Ribeirao Preto Sch Dent, Dept Dent Mat & Prosthodont, BR-14040904 Ribeirao Preto, SP - Brazil
[2] Univ Estadual Campinas, Piracicaba Sch Dent, Dept Restorat Dent, BR-13414903 Piracicaba - Brazil
Total Affiliations: 2
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES; v. 61, p. 65-70, SEP 2015.
Web of Science Citations: 1
Abstract

Objective: The aim of this study was to evaluate the influence of thermomechanical fatigue (TMF) and two adhesive systems on bond strength (BS) of repaired nanofilled composite. Materials and Methods: A hundred test specimens (8 mm diameter x 8 mm thickness) were obtained (Filtek Z350, 3M ESPE, St. Paul, MN, USA) and separated in 10 groups (n=10), according to the type of adhesive system for repair and TMF, after and before repair. Control groups: G1 - without repair and TMF (control); G2 - without repair+TMF. Groups repaired with total-etch adhesive system (ASB - Adper Scotchbond Multi-Purpose, 3M ESPE): G3 - repaired without TMF; G4 - TMF before repair; G5 - TMF after repair; G6 - TMF before and after repair. Groups repaired with self-etch adhesive system (CLB - Clearfil Liner bond 2V, Kuraray Dental): G7 - repaired without TMF; G8 -TMF before repair; G9 - TMF after repair; G10 - TMF before and after repair. After treatments, sticks (1 mm(2)) were obtained and submitted to the microtensile test (0.5 mm/mm). Failure modes were observed in Scanning Electron Microscopy (SEM-Jeol JSM 5600LV). Results: Statistical analysis (2-way ANOVA, Tukey, p <0.05) demonstrated that G2 presented highest BS values that differed statistically compared with those of other repaired groups submitted to TMF (p <0.05). Regarding control groups, G2 presented the highest BS values, different from Cl (p=0.0087). Fractographic analysis demonstrated that all repaired groups showed predominantly adhesive failures regardless of the adhesive system used. Conclusions: The TMF can improve the BS of repaired composites mainly when used self-etch adhesive, which demonstrated higher BS. The timing of TMF influences the BS of the repair on composite. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/09397-8 - Effect of thermomechanical fatigue on bond strength of repaired composite
Grantee:Bruno Rodrigues da Silva
Support Opportunities: Scholarships in Brazil - Scientific Initiation